Add language defaults for first-run experience and introduce Qt tool command wrapper

This commit sets default languages to English for the application unless the user specifies a different language, ensuring a consistent first-run experience across different system locales. Additionally, a wrapper for Qt tools is introduced in the CMake configuration for non-Windows platforms to filter out non-actionable output during builds.

CMakeLists.txt

@@ -1530,6 +1530,13 @@ endif()
 
 if(HAVE_TRANSLATIONS)
   option(TRANSLATIONS_VERBOSE "Show verbose output while generating .qm translation files" OFF)
+  # On non-Windows platforms Qt doesn't need a PATH-setup wrapper for tools, but we can
+  # provide a wrapper to filter non-actionable lrelease noise during normal builds.
+  if(NOT CMAKE_HOST_WIN32)
+    set(QT_TOOL_COMMAND_WRAPPER_PATH "${CMAKE_SOURCE_DIR}/cmake/qt_tool_wrapper.sh"
+      CACHE INTERNAL "Wrapper used when invoking Qt tools from CMake" FORCE
+    )
+  endif()
   qt_add_lupdate(strawberry_lib TS_FILES "${CMAKE_SOURCE_DIR}/src/translations/strawberry_en_US.ts" OPTIONS -locations none -no-ui-lines -no-obsolete)
   file(GLOB_RECURSE ts_files ${CMAKE_SOURCE_DIR}/src/translations/*.ts)
   set_source_files_properties(${ts_files} PROPERTIES OUTPUT_LOCATION "${CMAKE_CURRENT_BINARY_DIR}/data")

cmake/qt_tool_wrapper.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+tool="${1:-}"
+shift || true
+
+if [[ -z "$tool" ]]; then
+  echo "qt_tool_wrapper.sh: missing tool argument" >&2
+  exit 2
+fi
+
+base="$(basename "$tool")"
+
+# Qt LinguistTools (lrelease) prints some noisy informational lines to stderr that
+# are not actionable during normal builds (e.g. "Removed plural forms...").
+# We filter only those specific messages.
+if [[ "$base" == "lrelease" ]]; then
+  "$tool" "$@" 2>&1 | sed \
+    -e '/^Removed plural forms as the target language has less forms\.$/d' \
+    -e '/^If this sounds wrong, possibly the target language is not set or recognized\.$/d'
+  exit "${PIPESTATUS[0]}"
+fi
+
+exec "$tool" "$@"
+

src/main.cpp

@@ -283,6 +283,13 @@ int main(int argc, char *argv[]) {
     }
   }
 
+  // Default to English unless the user explicitly selected a language (CLI or settings).
+  // This makes the first-run experience deterministic across system locales.
+  if (languages.isEmpty()) {
+    languages << u"en_US"_s;
+    languages << u"en"_s;
+  }
+
   // Use system UI languages
   if (languages.isEmpty()) {
 #  if QT_VERSION >= QT_VERSION_CHECK(6, 7, 0)